[Issue 3459] New: There should be a flavor of file.listdir() that returns a range instead of taking a delegate

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=3459

           Summary: There should be a flavor of file.listdir() that
                    returns a range instead of taking a delegate
           Product: D
           Version: 2.035
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Phobos
        AssignedTo: nobody at puremagic.com
        ReportedBy: llucax at gmail.com


--- Comment #0 from Leandro Lucarella <llucax at gmail.com> 2009-10-30 21:21:07 PDT ---
This idiom:

----
foreach (f; listdir(some_dir))
    writeln(f);
----

is much more simpler, convenient and clearer than:

----
listdir(some_dir, (string f) { writeln(f) });
----

Which looks more obscure (specially when the callback is more complex.

The first idiom was not possible in D1 without allocating an array for the
elements, which can be inefficient, but with ranges in place in D2, I think
listdir() should use them.

Thanks.

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